It’s not happened since several versions ago.
It happened 3 or 4-times today, within an hour. It happened last week not long after it updated, several times.
It’s opening a URL from a CSV file. The TAB and web-page opens but that’s where it stops.
I will run it tomorrow and see if I can detect more clues but I don’t think there’s much more I can add, unfortunately. I cannot provide a URL because it’s behind a wall.